IR Clarity of B/W 480 TV lines vs colour 540 TVL

[kapten 0]

I am trying to decide if it's worth purchasing a dual lense 1/3" Sony Super Had camera that uses a colour lense during the day and switches to a B/W 480 TVL lense at night. My other option is a standard colour 1/3" Sony Super HAD CCD with 540 TVL.

 

Given that IR gives an essentially B&W picture, would the clarity of the B&W lense (480TVL) be better, worse or around the same as a colour lense with 540TVL ?

[Kingvision 0]

suggest you using that 480TVL with IR, cause 540TVL low illumination condition was worse than 480TVL in B/W, much more noise in image.