High tensile steel is the bottom of the hierarchy of steel bike construction. Then there are various grades of cromoly steel frames. So enthusiasts look for generic cromoly, along with recognized cromoly brands such as Reynolds, True Temper, Tange, and so on. The cromoly tubes tend to lead to a lighter weight frame.

I have owned and sold a variety of high ten steel framed bikes. Nothing wrong with them. But anything cromoly will be more desirable and ligher weight.