Transformer stepup size


Does size matter in stepups, ie is there a correlation between magnetics size and sound quality? I notice higher price units (the legendary SU-1, AN or S&B) are a lot bigger than say the Lundhal (diminutive) size. What has been your experience?
divo
Gents: there has been a deviation from topic here I notice.
Nevertheless, for info, let me tell you that I have owned many phono stages without stepup : Atmasphere MP-1, the Groove, Walker Reference and the Aethetix IO. I have also owned a few that use a SS stepup (Audible Illusions, Herron) and some that use a transformer stepup(Hovland and now the amazing K&K). So I have been around the block a few times. I currently favour the much more expensive but stunning Bent Mu stepup(with integrated short interconnects) over the Lundhal inside the K&K. So I was probing for actual comparative experiences with stepups to calibrate my own, rather than debate the usefulness of stepups. Debates of the comparative value of phono stage design with/without stepups for MC application have been covered elsewhere, I believe.
Perhaps I selected the wrong forum.
Welcome back Divo, and my apologies. If I had bit my tongue and not responded to the original digression it might have died when it began. Mea culpa.

For SUT's I've only heard the Mu, so can't offer any tranny comparisons. I'd also be interested in any comparisons that may be offered in response to your question.
I, too, enjoy my K&K very much and may have interest in the Bent, having formerly owned John Chapman's passive linestage. Thank you Divo for mentioning specific models, as opposed to general name brands - more what I sought.
Dear Divo: The number of turns in a stepup transformer it's a very important issue. In the same conditions: design, execution of that design, same preamp,..etc. You must to go for the " bigger one ", this one has a better frecuency response speciality on the bass reproduction.
Regards and enjoy the music.
Raul.
Divo,

Glad you like your MU as much as I..I can't say enough about how excellent a product. Dont want to digress the subject further on this thread, however that may be too late anyway. My recommendation for the MU came from TWL..who was kind enough to lend some opinion on the SUT. After owning one for just a short time, I can say his assesment of their use was spot on very worth the investment.,,:) Ken