A race sail if used occasionally as a cruiser, will last longer than one racing to a degree too. A race sail for a full bore race may be 25-50 tacks, or 3-5 races or maybe one! For a cruiser, the speed difference with 1 tack/useage vs 150 is minor for most of us.
If the price is right, you will probably gain some speed vs you Dac sail, actually, I have no doubt you will gain speed, along with less heeling too. If the boat will be gone in 4-6 yrs, you got your fun out of it!
She drives me boat,
I drives me dinghy!