A 14 and 18 are not a significant difference. Not in 5e anyway. The difference is two hits every 20 swings, which for the bulk of play since most games never get to 10th level, means 2 extra hits spread over 4-5 combats. You're never even going to know they happened. The +2 to damage is likewise insignificant. 5e monsters are bloated bags of hit points, so the piddly extra damage to the hits you get during a combat aren't going to have a noticeable effect unless the DM tells you.
Stat bonuses are hugely overrated in 5e, probably for two reasons. 1) past editions. Up to 5e, the treadmill meant you needed all of those plusses just to stay even. 2) humans liking bigger numbers. Humans liking bigger numbers is the reason why the news always tells you that your chances of a heart attack have doubled, rather than tell you that your chances went from .001% to .002%.