Ribbon mics are more like our ears. High quality ribbons produce a smooth and natural sound. They also take EQ really well. But I've only owned two brand, Beyer and Royer. Royers are wonderful mics. I own a few R122's and an SF24. I love them and want more.
Lower end converters and recording gear in general tends to be harsher. Digital recording can be less forgiving. Ribbon mics are a great match for digital recording because they are warm and smooth..
I've owned and used lower end ribbons and hated them. They can sound dull and wooly. High end ribbons are like silk. If you have great preamps, great ribbons work like nothing else.
Sorry I'm not more detailed here but that's my take on it, in a nut shell.