oddly enough in both cases I would plunk down the heart ace and lead another toward the Q.
1. Both leads are "odd" since each is a unsupported honor.
2. In each case it appears that there is a reasonable chance a ruff is impending.
3. In case 1 if rho has Kx they can always give their p a spade ruff so the finesse for the J is useless much better to play the Q hoping lho began with Kxx.
4. In case 2 once lho plays small to the 2nd heart it appears to be a complete guess since a ruff seems to no longer be a factor. The lead of the club A (trying to give p a ruff) is much more likely when lho is looking at a quick entry and the only plausible quick entry this hand has is the heart K. Once we play the ace and another heart all thought of a ruff disappear and lho plays small hoping to give us a chance to go wrong and finesse for the J they hope p has.