Can you just flash normal over prf? if yes then indeed there's no point comparing, just flash the offered one if it's not yet flashed
Otherwise we may make something similar to linux kernel version - converting it to long integer - ((a?a:0)<<24 | (b?b:0) << 16 | (c?c:0) << 8 | (d?d:0))

btw the one thing which is itching me the most (however i didn't have time to look at it yet) - is developer connection. Is it something present in the libpebble2 and thus could be implemented in the rockworkd/rockpoold?