I was wondering between the two myself a while back, but after the last legendary incubator deal I bought x2 of them (mostly saving up the tapjoy rewards and a little of my own £’s) I got the Allinosinosaurus twice and levelled it to 17.
In all honesty, I haven’t been that impressed with her. She’s too slow, lots of better dinos get the jump on her and she’s down before getting the chance to Instant Stun most of the time. The armour benefit is negligible and despite what it says about having a 20% crit chance, I haven’t been getting it (although may just be unlucky). However, against anything slower than her (not much)… she is a beast! With the good base damage the x2 armour piercing attack chomps through most dinos. There’s been a few times I’ve taken out the slower dino first only to have my opponent switch to a raptor but then using Instant Charge to take a chunk out of it before pouncing on poor little allo.
Unfortunately this is a rare event, most of the time her poor speed lets her down. I’m aiming to eventually replace her with the utahsinoraptor once I get sinotops to 15. Was hoping for them to release a guaranteed incubator with it in to bump up the levels but still waiting! They done it with pyroraptor and nodopatasaurus so thought it would be the same this week…
Sorry for the long message, but hope it helps you decide.