Just finished 4 shaves in my muhle r41 with both. I changed the blades for each side of my face which proved to be slightly annoying but decided it was the fairest way since I don’t have any duplicate razors, and I’m most familiar with the r41. After 4 shaves the current Astra SS probably has one more shave left, while I could see the vintage going another couple shaves. The vintage is slightly smoother but both blades are a good combination of sharp and smooth. Would use either one but wouldn’t go out of my way to find the vintage ones or pay a higher price with them being vintage.