Not sure if you're serious, but 14/15 Juve is clearly better:
Buffon, Lichtsteiner, Bonucci, Barzagli, Evra, Marchisio, Pirlo, Pogba, Vidal, Tevez, Morata
vs
Szczesny, De Sciglio, Rugani, Bonucci, Alex Sandro, Emre Can, Pjanic, Matuidi, Bernardeschi, Dybala, Ronaldo
Juve 14/15 were one game away from completing the treble. In 18/19, they lost out in the quarters of both the CL and Italian Cup. So achievement wise, not even close. Performance wise, they were more tumescent and uninspired this last season without doubt. They played better football in 14/15 plus had much better players closer to their peak.