I think the Lange way is more purist and admirable/desirable for a high-end company, but the Patek way is more pragmatic. Personally I think using more ubiquitous movements makes servicing easier and thus cheaper, but Patek should then price themselves accordingly, which they are unlikely to given their vast brand equity. The cal 240 is easily trumped by, for example, the Pf 701 in the Tonda you saw. Finishing, materials, bridge design etc. Patek is well-known in the horological community for giving lower-tier finishing to their non-complicated watches. The 215 and 315 are clear examples of this - they do not compare to the historical 23-300 of the 50s. Same with Vacheron, to a lesser extent. Compare the current 4400 to any of their vintage calibres. The 4400 uses a simplified layout for easier manufacture. On Dornblueth, wouldnt servicing one with a Unitas calibre mean replacing parts with a standard finish? Thus negating the Dorn value proposition altogether. I considered the Quintus seriously as well but in the end was just not moved by its dial. And one has to truly fall in love with a watch imho. Roger Smith has great finishing, but again, the dial doesnt move me emotionally. Same with Dufour. I do like Romain Gauthier though, and De Bethune, but they are rather big watches.