Moshe Rabbeinu did not wear a tie, a suit, a bekeshe or a fedora. Rebbe Akiva and Rashi did not dress like Rav Moshe. Bnei torah dress with a certain kavod, a respectability. Some communities maintain a stricter adherence to older modes of dress, some are more up to date in their modes of dress. But let’s be real – few communities can date their mode of dress to the rishonim – and these are mostly the sefardim, no the Asheke/Chassidim.
The idea of bochrim shaving is not new. Look at pictures of the yeshivos before the war. Bochrim in the Lita and many in Poland did not have beards or long peiyos. They generally wore suits and fedoras, and most were colorful – not just black. Ties are not new – you see them in the video of the Chafets Chaim.
Times change and styles change. Not a reason for machlokes.