The database lists two versions:
Criterion Special Edition (1994)
and
Criterion Edition (1996)

What exactly is the difference? Its not listed there, but there must a be a difference with former having a 100$ RTP and latter 50$ RTP

Obviously you don't own an LD player or discs.

One is CAV and one is CLV.
CAV, film is over 2 discs and has extras as listed. Halloween: Special Edition #247 (1978) [CC1399L]

CLV, film is on 1 disc, 2 sides and only has a trailer. Halloween #310 (1978) [CC1462L]

Search up CAV and CLV it will explain a lot of information.

Oh, didnt notice the Format (CLV/CAV) and wasnt sure if there were no extras or someone just forgot to list them.
Thanks