Tanks in BF evo, can be killed with a single hit, but you need to roll a good 9-10 with a d10, but you can do it...
Things change with SST EVO, now the big bugs cannot be killed with a single hit, but i think a KILL does 2 hits instead...
I thought being living tissue, a KILL should be a KIll, be BF evo is real life, and SST evo is more move feel...
But you can change the rule if you wish, maybe a 10 on a d10 is a instant kill etc..
Its your rules, but i have only seen a early version oF SST evo, but i did like the rules better then the old set...