Both high velocity and standard velocity (subsonic) .22LR rounds can be nearly as accurate. However, high velocity rounds are subject to about 23% greater wind drift at 50 yards, due to the transition zone effect, but only for that portion of the flight after entering the transition zone.
Prior to the transition velocity, which occurs usually inside of 50 yards, they should have less wind deflection and after going through the transition, they have the same deflection as a standard velocity round. Unfortunately, the angular deviation has already occurred, so the bullet continues to deflect at that angle, plus the deflection as a subsonic round at longer distances.
Accuracy of a .22LR is dictated by the care in manufacture (uniformity) and how that particular configuration is tolerated by the rifle. There may be few makes/types of ammo that cause a .22LR rifle to shoot it's best. It's up to the owner/shooter to test various brands/types to achieve the best results at reasonable cost.
Bottom line: If you find ammo your rifle likes and your pocketbook doesn't scream too loudly, buy as much as you can afford of that particular LOT NUMBER. The next batch you try could be the worst stuff you've ever shot!