Merc vs sierra trim relay

[phatdaddy]

got a question about merc ob trim relays. my down trim relay went out on sat and i had to swap with up to get home. i was going to replace both (15 years old) and i usually try to use merc parts. i found a sierra "lookalike" and was wondering if it was as good or any problems out of sierra elec parts. i am not a fan of their water pump impellers, but have never used any electical stuff.
thanks