strange Electrum Wallet performance on different GPUs

[hash_cat_fish]

2070s has the same speed as 1080ti on md5 , but on mode 21700 , 2070s is more than twice as fast as 1080ti
tesla-t4 is much slower than 1080ti on md5 , but on mode 21700,tesla-t4 is much more faster than 1080ti

Does anyone know why? Is it because of larger L2 cache ?

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Options:
- Hashcat version: 6.1.1
- Hashcat options: -b --benchmark-all -O -w 4 (ie. complete benchmark)


# Hashmode: 0 - MD5
1080ti    Speed.#1.........: 36152.2 MH/s (51.85ms) @ Accel:64 Loops:1024 Thr:1024 Vec:8
2070s    Speed.#1.........: 35970.0 MH/s (74.49ms) @ Accel:64 Loops:1024 Thr:1024 Vec:8
2080ti    Speed.#1.........: 53975.3 MH/s (42.16ms) @ Accel:32 Loops:1024 Thr:1024 Vec:8
tesla-t4  Speed.#1.........: 20213.3 MH/s (132.27ms) @ Accel:64 Loops:1024 Thr:1024 Vec:1


# Hashmode: 21700 - Electrum Wallet (Salt-Type 4) (Iterations: 1023)
1080ti    Speed.#1.........:  208.1 kH/s (367.00ms) @ Accel:8 Loops:1023 Thr:1024 Vec:1
2070s    Speed.#1.........:  464.2 kH/s (480.54ms) @ Accel:8 Loops:1023 Thr:1024 Vec:1
2080ti    Speed.#1.........:  688.3 kH/s (273.79ms) @ Accel:4 Loops:1023 Thr:1024 Vec:1
tesla-t4  Speed.#1.........:  294.1 kH/s (266.28ms) @ Accel:8 Loops:511 Thr:1024 Vec:1


Reference:
https://www.onlinehashcrack.com/tools-be...080-ti.php
https://www.onlinehashcrack.com/tools-be...-super.php
https://www.onlinehashcrack.com/tools-be...080-ti.php
https://www.onlinehashcrack.com/tools-be...sla-t4.php