Our much-missed late Professor Tilley had an acronym to the effect of Hideously Expensive European Model Kits. I, for one, echoed his sentiment that, while they are models, they are not scale models.
There are some exceptions Calder, Syren, and some others are really serious kits. And, the price reflects that quality and precision.
Now, from my personal experience, Mantua is better than Corel or Artensia, but, still a bit on the "soft" side for detail and accuracy (their blocks and deadeyes and the like are not particularly well-formed or very uniform). Mamoli is often a better product, if the choice was available.
Sadly, with Mantua, I'd assume I would be replacing all of the blocks and deadeys, all the rigging, and probably the belaying pins. I'd hope that I did not need to buy up a bunch of basswood to replace the planking (which would be a dead certain with Corel or Artist's Latrine).
At a certain point, after you have bought a full set of plans, corrected all the hull shapes and collected a uniform, to scale, set of fittings, you might as well have just scratch-built the thing from scratch.
Ok, I'm a cold, wet, blanket--but, I've built some of these nothes before, and you are looking at spending 500 or 1000 hours on a thing you can only squint at. After all, you are the one who will intimately have to thread lanyards through lopsided deadeyes, and have to reshape every block, every flaw will wind up magnified in your own eyes. This is tough sledding.
Sadly, there is only the DiAgostini subscription kit as an alternative for SotS.