Roger Hicks
Veteran
For example, the only Tessars I REALLY like are f/6.3. At f/4.5 they're OK and at f/3.5 they're good portrait lenses on LF (I have a 300/3.5).The faster lens options are almost always (even today) the more 'premium' grade lens in the eyes of the manufacturer and customers. They cost more too. So they often are a better lens than the slower one.
BUT NOT ALWAYS ... The faster a lens is the more sophisticated its design and manufacture must be to achieve high quality performance.
So it's a little hard to predict lens performance solely by lens speed.
G
Cheers,
R.