That old Brooks should come back to life with a little love - I've seen some pushing 40 years that still look great.I have an old Brooks I'm currently trying to nurse back to health ( make less Iron-like leather) with some Proofide. It's sat on a shelf for years and I'm hoping to have it back on an ordinary bike I'm fixing up for Spring. With the Specialized one - right now it's fine for spins under 30 miles but longer ones seems to hurt a bit, but that's also my fitness as longer distances really stretch me so everything seems to hurt. Also I tweaked saddle height a lot in the early days, even a couple of mms seems to make a big difference. If weather picks up I'm aiming to do some more 50 + mile trips so I'll find out then. You liking the SL 4?
I like the SL 4 so for. I'm used to a 750w cargo bike I built a few years ago to haul around my kids and groceries - so there is a bit of a difference in terms of level of assistance, but I do like the feeling of riding a traditional bike - well worth the investment.