Why Is The Liquid Freezer III Cheaper Than The II?

I have the Freezer II 240mm and wanna upgrade to the 360 as I realised my case (Fractal North) has enough space for a 360mm.

But the new version (the III aRGB 360mm) is almost as cheap as the price I paid for the II aRGB 240mm?

This is making me think that they're not as good so they're selling them at a cheaper price? The IIs have gone up to over £100.

Anyone know? Is it cos the old ones are discontinued aka limited stock?