Fluffy, on 2014-December-17, 15:43, said:
Would you rather face...
1♥-2♠-pass-4♠? or....
1♣-2♠-pass-4♠?
The same applies for all level of spades from opponents, and most bids from partner. But it is not the main issue here. The main issue is that 1♥ is a lot more describing, and chances of partner raising a 5 card suit at first round are above 50%, a raise is extremely descriptive and avoids a lot of possible problems since after that.is just a matter of level. After a heart raise we can assume that there will be no club loser, and that partner will often have some honnor to cover our hearts. A delayed club preference when you open 1♣ leaves you in the dark about partner's heart holding.
It's funny that that you brought up the (2S)-(4S) auction as an example where opening 1H is better. I would use the same sequence that to suggest opening 1C! I'm planning to bid 4NT over 4S, and I want partner to preference clubs. I guess the difference is that you're treating this as a one bid hand, whereas i'm mostly planning to pattern out with a second bid if the opponents compete in spades.
Another point no-one has mentioned, is that constructive auctions which start: 1H 1S 2C make me feel pretty sick. If partner now bids 2H or 3NT i'm worried that we've missed a good game/slam because partner has downgraded a 'misfitting hand'.
As you point out, canape majors are a basic style idea but even though I agree with that idea in principle, the playing strength and suit disparity of this hand make it worth discussing.