However we should point out that this rendering is a recreation of the handset by TechDroider based on information their source gave them. This is similar to what the folks at Android Police did, meaning that while what you see could be pretty close to the actual product, there’s a good chance that it isn’t the actual product, but hopefully it will give you a better idea of what to expect.
Now it is pretty obvious that right off the bat the design is very different from the Sailfish. The glass backing on the back of the phone is gone, but the fingerprint sensor on back and middle portion of the phone has remained. It also looks a bit “sharper” as it seems that the edges of the phone appear to be more chamfered, but otherwise you could tell that both phones do share some relation with each other.
The Marlin is said to be the slightly larger model of the two, sporting a 5.5-inch display versus the alleged 5-inch display of the Sailfish. Unfortunately we do not have a date as to when HTC or Google will announce these phones, but assuming Google keeps to schedule, a Nexus announcement should be coming in the later part of the year.