REVLON One-Step Volumizer vs One-Step Straightening Brush Hair Dryer

Revlon sells these as two tools. They’re really one. The One-Step Volumizer (RVDR5222) and the One-Step Straightening Brush (RVDR5212) share the same 1100W motor, the same three heat settings (Low, High, Cool), the same tourmaline ionic output, the same 6 ft swivel cord and the same 4-year warranty. Revlon’s own comparison chart lists them side by side with every row matching except the head. So the whole purchase decision is a 2.8 in oval barrel against a 4 in flat paddle, and you pick by the finish you want rather than by any spec advantage. Want lift at the root and a bend at the ends? Buy the Volumizer. Want hair pressed smooth and straight with no bounce at all? Buy the Straightening Brush. Neither head detaches, so you can’t buy one body and swap.

2.8 inches of oval barrel is what makes the Volumizer the mainstream blowout tool. The rounded shape lets you wrap a section around it, lift at the root and turn the ends under as you pull through, which is the round-brush-plus-dryer motion most people are trying to copy at home. A flat paddle can’t do any of that. Tourmaline ionic output at 1100W dries as it shapes, so fine or limp hair gets body without a second pass with a separate round brush. Mid-to-long hair benefits most, since the barrel needs enough length to wrap. Reviewers who’ve used both heads side by side find volume comes easier with the barrel, and the geometry backs that up. Three settings cover it. Low for daily styling, High for thick sections, Cool to set the shape on the last pass. One warning applies to both tools: High runs very hot, and most people should live on Low.

Curly-to-coarse hair changes the answer. The 4 in flat paddle spreads 1100W of tourmaline ionic heat across a wide, flat face, and the bristles pull through dense sections while the heat presses them straight. That’s why the Straightening Brush works as a blow-dry stretcher on type-4 hair. It detangles as it goes, and the flat face gets closer to the scalp than a 2.8 in barrel can. Which One-Step works on 4C hair? This one. The paddle won’t lift roots or curl ends, and Revlon says so plainly, but on tightly coiled hair you don’t want either of those. You want stretch and a sleek finish, and the paddle gives you that in one pass. On thick wavy or frizzy hair it does less well than on fine hair, because the wide face can’t concentrate heat the way a barrel wrap does, and you may still reach for a flat iron afterward for a glassy finish. Same 6 ft cord, same 4-year warranty, same three settings. Nothing else on the spec sheet changes.

Say you have shoulder-length, fine hair that falls flat by noon. You towel-dry, section the top, wrap it around the Volumizer’s oval barrel on Low, and pull slowly from root to end. Then you hit Cool on the last pass to set the lift. Ten minutes later it looks like a salon blowout. Now swap in the Straightening Brush on the same head of hair. You’ll get smooth, straight strands with no body, and the paddle’s 4 in width will feel clumsy on short layers. Flip the scenario to thick, coily hair and the Volumizer struggles to grip and stretch, while the paddle’s wide face and bristles glide through a dense section with detangling as a side benefit. Either way, expect the handle to warm up over a long session, expect a loud motor, and expect cleaning to be awkward, because neither head comes off. The 6 ft swivel cord reaches from the outlet to the mirror without twisting. That’s the same on both.

Pick by hair type, then by routine. Fine, limp, or mid-to-long hair that needs lift gets the Volumizer, and its 2.8 in oval barrel is the head to buy if a blowout is the goal. Curly, coarse, or type-4 hair that needs stretch and a straight finish gets the Straightening Brush, and its 4 in paddle detangles while it works. If you flat-iron every day and want to skip that step on most mornings, the paddle saves you a tool. If you already own a round brush and a dryer and want them collapsed into one handle, the barrel replaces both. Both tools pull 1100W, both plug into 120V only, both carry the same 4-year cover, and both run hot enough on High that Low should be your default. Don’t buy either expecting it to do the other head’s job. The paddle won’t give bounce and the barrel won’t press coils flat. Two heads share one body, and the only decision left is which finish you want in the mirror.