In what way? Basically the inline helps put the vapor beneath the center of the honeycomb, so it can then diffuse through all the honeycomb. I used to have a similar styled ratchet disk perc, without the inline, and the vapor tends to take the path of least resistance near the joint, so part of the perc was kind of wasted and it chugged a bit more. The inline helps it be really smooth pull with very little resistance so you can pull a big cloud through. It helped me get the hang of my Underdog, and works great with my T1 too. Also a 18-14mm reducer was only like $8 on eBay, got it for my underdog, and the bubbler was only $40
@delloy all Hoppers come with the leather sleeve.
My logic for Ti is it may be useful for groups moreso than the ss, since it stays cooler. But with the silicone protector may not be much of an issue. But also my logic is to order both so....