Root Pump Plus is a mousse that you spray directly onto your roots - remember, it has a spray nozzle rather than the normal mousse applicator! I didn't quite remember this the first time I used it and sprayed mousse all over my wall and the washing drying on the radiator (oops). It doesn't have much of a scent to it which is fine by me. This really adds oomph to your hair and holds it in place without feeling crispy, though it does feel like you've got product in your at the roots hair which doesn't bother me. I can go for a couple of days without washing my hair after this - it definitely doesn't overload it - and the volume stays for the next couple of days. My boyfriend was even like "whoa, what's happened to your hair...it's really big?". I prefer this for nights out because of the hold and the level of volume it gives.
The Blow Dry Volumizing Gel is like a traditional hair gel in consistency which I found a bit weird to apply, I expected my hair to crisp up and feel like it was gelled. Thankfully it didn't and once I blow dry with this I have full volume hair with shine. It doesn't feel like there's product in my hair when I use this and though the volume lasts well, I don't think it's quite as strong in terms of hold as the Root Pump Plus but it's still pretty good.