Why is V-slot so much more expensive than T-slot

Why is V-slot so much more expensive than T-slot v slot extrusion hello all, this may be a stupid question but ive always used v-slot extrusions cause im coming from messing with 3d printers so alot of my vvip slot V-Slot is a high quality extruded aluminium profile building block that has an extremely smooth linear v groove rail on all 4 sides

vvip slot V-Slot 20 x 40mm is a versatile profile that is based on the widely used V Slot linear guide system Its square shape gives it extra strength and functionality

vikings journey slot Description V-Slot Linear Rail aluminum extrusion profile is the ultimate solution combining both linear motion and a modular, structural framing system It's Product Details 2020 V Slot Aluminum Extrusion Profile Silver Free Custom Cutting Secure Packaging Next Day Shipping Tapping