you can say if the vulnerability affects your decision.
on the first hand you're 2nd in. 2D is a very weak only multi and RHO is an absurdly aggressive player. scoring is point-a-board/imps hybrid.
on the 2nd hand you're 4th in. the multi can include strong bal hands. they're playing muiderburg. scoring is imps > victory point swiss.
your defence is x = 13-15 bal or any 19+. bids are natural. you can show the minors by passing then backing in with NT, but it would be a purely competitive effort.
what's your plan?
on both occasions i overcalled 3 clubs. you can disagree with this if you like, but it's what i did so i was faced with a decision about whether to reopen or not after LHO bid 3H pass or correct (actually on the 2nd hand partner bid 3NT in front of me which i was delighted with, but assume it's passed back)

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