It seems to me that I recall the higher amp NiMH batteries are not rated for as many discharge/recharge cycles as the standard ones are. My thinking is that this is due to having a thinner cell plate material and thus more prone to deterioration and pinholes forming from the discharge/recharge cycles. Of course, I may have NiMH chemistry *all* wrong. The higher amp batteries may not need recharging as often as the standard ones, but there discharge/charge duty cycle will be less. Where the balance between the two is is unknown to me.
I've used the standard Eneloops and have had very good performance from them. Seems, though, the original "white" ones may have held up better than the later blue/pale-blue ones do.
If you're needing fast flash recycle times then the higher amp batteries would probably be best, for regular shooting the standard ones seem good.
But this is all from my personal experience and nothing scientific about my musings...
Reason for edit: Added the bold-faced not, which I meant to have there to start with.<sigh>