The Minolta is the lower cost option on the used market....most photographers today have zero memory of the fact that Minolta commanded #1 position among both pros and amateurs in the meter market for decades, before they left the meter market thereby allowing Sekonic to finally move up in the rankings.
So now you see tons of recommendations for Sekonic, and little mention of Minolta meters. Greater awareness makes Sekonic immediately in greater demand that Minolta, although both are equally fine products!
The spot attachment for Minolta is only a 5 degree spotmeter, which make it a bit less valuable than a one-degree angle of view.
The Autometer is more comparable to Sekonic L358, so the consideration is similar to
"L308 or L358...which to buy?"