I need AA Rechargeable for my Xeno E15 and Nitecore EA4 purchased from wallbuys/fasttech.

There are two types of sanyo eneloops available:

2000mAh buy can be recharged 1500 times, Maintains 75% of its charge after 3 years of non-use.

2500 mAh can be recharged 500 times, Maintains 75% of its charge after 1 year of non-use.

Sanyo is offering either 2000mah for 1500 cycles or 2500mah for 500 cycles.
3X recharging capacity is a big difference between them but XX eneloops is 500 mAh more. How much longer will it last or how much difference does it make in real world.

Is the discharge rate gonna be the same between the two cells. Which one should i choose ? Anyone have both these cells ?
i need them specifically to power the Xeno E15 and EA4.

there are 3rd gen 2000mAh Eneloops now, that are rated for 1800 cycles and 70% after 5 years of non-use.
And 2rd gen 2500mAh Eneloops, which are rated for 800 cycles, and 85% after 1 year of non-use.

2000 cost far less than 2500, its cheaper to buy 2000 in numbers that in total matches overall capacity of 4 or 8 2500, than buying 4 or 8 2500, you lose more money and have lesser cycle life.
Unless they cost the same, Id go for 2000, which at least theoretically, will have better long-term use protection with its increased cycle count, lesser risk to run your battery out of juice due to too many charge cycles, especially if youre not going to baby them.