I jab all the time >_>
like spacing fairs and jabs against Yoshi and his shield or f-tilting for mild kills
young Links don't really use the F-smash to kill that much
Link does have a slight bit more potential in more matches than young Link, but I'm not sure if this is one of them. He certainly has more range in general; most notably his jab, utilt, d-smash, and fair, but other arials and attacks don't really stand out as convincingly larger or are even useful to Link, (i.e. such as Link's uair, dair, etc. don't have larger hitboxes; his projectile range doesn't go much farther; and f-tilt and u-smash have more range than young Link's, but are too crappy too be used with Link due to being too slow[f-tilt] or will never hit[u-smash]). Don't forget that young Link can combo longer and more fluid than Link can with projectiles, and they both have the similar combo scheme with close combat range.
And anyway, Yoshi is just too easy too edgeguard, bomb guarding does well too get damage when he's recovering and a simple dair will cancel his horrible double jump. And I'm curious, can Yoshi even Meteor cancel Meteor spikes (smash)? I don't think he can, can he. Young Link's d-tilt for edgeguards would **** then in this matchup
Also, young Link's spam is > than Yoshi eggz
Of course, Yohshi d-tilt gimp kills suck, and DJC'ing bomb combos is no fun either.
Overall, I'd say young Link would have the slight advantage in this matchup.