If the one without a vent rib is still available, buy it.
It should be dated pre-1950
These are pure mini-1911, very well made.
The detail-strip just like a 1911, except for the extractor which is external.
May favorite guns. I have 3 of them.
The one with the vent ribs came later, and the rib grew bigger after 1960 or so. Still neat guns, but the old ones were unique and also better made.