I have both and I want to say neither. I've had weird reactions to Sliquid lubes (internal "burning" that feels like someone poured hydrogen peroxide in my vagina, and weird/funky smell). However, if I use a little too much of Maximus and/or am a little too 'rough' with whatever dildo I'm using it with, then I get a little bit of internal burning from the parabens. Something else I noticed with Maximus...after play and before my bits absorb completely or flush the lube out, my vagina has an off smell. Well, more like no smell or a slightly sterile smell. Now you would think that that would be better than a funky smell, but no smell or not even my own natural smell makes me a bit cautious.
Anyway, I've been trying some new lubes out, just got the Ultra Sensitive Lube gel, but haven't used it yet. Have been using the ID Hero H20 (which is just the ID Moments -in the pink bottle, which I also have- just in a fancy "manly" bottle).