WAG302 vs WG302 firmware

[sktn77a]

I see that the v1 versions of the WAG302 and WG302 wireless access points use the same firmware upgrades through the end of August, 2006. I also see that last version of the WAG302v2 (5.1.19 - november 2006) is the same as that for the the WG302v2. However, the WG302v2 firmware upgrades then continue for another year (5.2.3 - november 2007). As these routers are supposedly identical, aside from the inclusion of an additional PCMCIA wireless "a" card in the WAG302, can I use the 5.2.3 firmware upgrade from the WG302v2 on my WAG302v2?

Thanks

Keith