Winding feel question

[FSUGeoff]

I have a Hulk and a D-Blue and as far as I know both have the same movement, but on the sub the winding is much smoother and louder, than on D-DBlue, anyone with both a Sub and Deepsea notice these differences. Sub was bought new and D-Blue used, I also notice I can wind the Sub faster and it feels more sturdy, when I try and wind the D-Blue fast it almost feels like the gears slip a little, if that makes sense. sShould I be worried, 4 years warranty left on D-Blue, but it keeps perfect time, only issue is the winding described above.

pics for interest

[77T]

I would not worry since it is keeping good time. Winding the mainspring difference between the two shouldn't affect anything. If it did malfunction down the line, you have the warranty to get it fixed.