Greetings! Since you haven't really identified a purpose for your 38, I'll presume it is purely collection oriented.

I would lean towards the K38, especially if it had the 3Ts (target: trigger, hammer, and stocks). I find the K38 6" models to be superbly accurate with mild 38 Special target loads. A pound of Bullseye and over 2000 wadcutters will last a long time and provide exceptional enjoyment. Also, most who have owned K38s have tended to baby them as bullseye target revolvers.

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Judge control not gun control!