[Q] is booting 4.4.4 on zperia z (6606) stable?

Hi. Can someone advice me on this one? I have a tmobile xperia z(6606) and they have not yet released the new firmware for any of the xperia model so im deciding to rooting my sony (6606)..but the prob is all i see are firmwares for the 6603 model, if i boot that firmware to my model which is the 6606 will it be stable and safe? I have rooted 4.4.3 (6603) on my phone before tmobile released theirs but sometimea my phone just restarts by itself..so if anyone can advice me on this you are awesome. And thank you for ur time

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