Those are 100ns chips. That's what the -10 means. The HY is for Hyundai. You chould be OK with any in the 70-120ns range.
The thing to be carefull is the configuration of that memory. The amiga's expansion slots autoconfig. Memory cards in the 2000 "Zorro" slots fit into an 8MB space. If you have an accellerator card, it could have memory in that space, meaning you can't add any more ram to the Supra board. Some accellerator boards will let you move their RAM outside of the autoconfig space using jumpers, but not all do.
If you have an accellerator card, it could have some open RAM sockets... it would be better to invest in this RAM, since it's 32bits wide and will be faster than the Supra.
It's also possible to have SCSI cards with RAM, these will also take up some of that Zorro space, if enabled.
-Jim