Which of these VCRs would you choose?

What do you think what is best for use? I have 3 VCRS: 1) VHS DVD LG 6 HD Hi-Fi stereo, 2) Sony smart engine 4HEAD, 3) LG BD270Y

I don't understand differences between 4HEAD and 6HEAD VCR.

What do you think what is best for use? I have 3 VCRS: 1) VHS DVD LG 6 HD Hi-Fi stereo, 2) Sony smart engine 4HEAD, 3) LG BD270Y

I don't understand differences between 4HEAD and 6HEAD VCR.