There's a difference between how Infinispan and Redis handle SDIFFSTORE executed with non-existing keys. While Infinispan creates or overrides key with empty key set in Redis the key no longer exists after applying SDIFFSTORE with empty sets.

The same applies for SINTERSTORE and SUINIONSTORE

SDIFFSTORE Full test: https://github.com/redis/redis/blob/7.2.5/tests/unit/type/set.tcl#L520-L541
SINTERSTORE Full test: https://github.com/redis/redis/blob/7.2.5/tests/unit/type/set.tcl#L595-L613
SUNIONSTORE Full tests: https://github.com/redis/redis/blob/7.2.5/tests/unit/type/set.tcl#L659-L687

Infinispan:

127.0.0.1:11222> SDIFFSTORE setrest{t} foo111{t} bar111{t}
(integer) 0
127.0.0.1:11222> EXISTS setrest{t}
(integer) 1

Redis:

27.0.0.1:6379> SDIFFSTORE setrest{t} foo111{t} bar111{t}
(integer) 0
127.0.0.1:6379> EXISTS setrest{t}
(integer) 0