Someone please explain to me the $100 price difference between this (black) Titanium Observer and the other (sliver) Observer watch. with same features? is it only the titanium that you are paying for?

Tech Specs:

Housing Material:

[TT model] titanium; [ST, SR and Standard model] stainless steel 

Strap Material:

elastomer 

Altimeter:

yes, usable to 29,500ft (9000m) 

Altimeter Max Height:

29,500 ft 

Heart Rate Monitor:

no 

Barometer:

yes 

Thermometer:

yes 

Digital Compass:

yes 

Adjustable Declination:

yes 

Chronograph:

yes 

Backlight:

yes 

Water-Resistant:

yes, 100m 

Alarm Type:

, date, altitude 

Recommended Use:

casual wear, skiing, mountaineering, navigation 

Manufacturer Warranty:

1 year