Kevin Pacey wrote on Sat, Oct 19, 2019 05:24 AM UTC:
In FIDE chess, 1.e2-e4 d7-d5 2.e4xd5 Qd8xd5 3.Nb1-c3 Qd5-d6 is a very popular way to play the Scandinavian Defence for Black these days, and so the sequence 1.e2-e5 d7-d4 2.e5xd6e.p. Qd8xd6 that you mention in your proposed variant would seem to be a whole tempo up on that popular Scandinavian Defence line for Black (although the pawns move differently here, it may not help White out much by comparison). So, at least for the sequence you gave, Black is not clearly hurting because of the different pawn rules.
In FIDE chess, 1.e2-e4 d7-d5 2.e4xd5 Qd8xd5 3.Nb1-c3 Qd5-d6 is a very popular way to play the Scandinavian Defence for Black these days, and so the sequence 1.e2-e5 d7-d4 2.e5xd6e.p. Qd8xd6 that you mention in your proposed variant would seem to be a whole tempo up on that popular Scandinavian Defence line for Black (although the pawns move differently here, it may not help White out much by comparison). So, at least for the sequence you gave, Black is not clearly hurting because of the different pawn rules.