For a one shot session, I'm DMing a 5th Edition Level 1 adventure, but our regular sessions are 4th Edition. The group is a mix of some new players and experienced players.

The new players will be playing purely 5th Edition. That's fine as it's just try out D&D. But not all experienced players want to switch te 5E for just a single session. There happy with playing their one-shot character as they are used to (Standard/Move/Minor action), despite my end being a bit different.

This got me to thinking;

Looking purely stat wise (Ability Scores, Modifiers and bonuses) could the experienced players use a lvl 1 4th Edition character, dispite the monsters on my end being 5th Edition?

Is there, stat-wise, a difference between a 4E lvl 1 character and a 5E lvl 1 character?