Neotech NC-P313 vs. Furutech FI-28 Plugs


I am going to be constructing a power cable and wanted some advice. I had Wattgate standard power connectors on my power cable and they didn't sound too good. I upgraded them with cheap Sonarquest pure copper plugs (at least that's what they say they are), and the positive effect of these plugs was instant and profound! 

Having the Sonarquest plugs make such a HUGE positive difference, I was wondering if upgrading to a Neotech or Furutech would be worthwhile, since they are better made than the $11 Sonarquest plugs? I am trying to decide between these 2 models of plug. I ALSO, wanted to know if the FI-28 is the same as the FI-46, but with a different body?

If anyone can help me with this, who has tried any of these plugs, that would be great!
parimento1
A long time ago I compared the Xhadow silver plated XLR to Furutech gold-plated XLR.  The Xhadow was okay, but it had sort of a phasing effect to the sound.  The Furutech gold on the other hand sounded so natural and organic.  It is warmer sounding, of course, and softens the highs.  If you are using Xhadow in your interconnects, it's possible that the Neotech gold may be the best pairing.  It's up to you.
So.. I ended up splurging and getting the FI-46 and boy was it expensive, but boy does it ever sound good! I was not expecting much.
Nice!   Be aware that the sound could possibly get very painful to listen to during the break in.  Just be patient.  250-300 hours.
Yes, the sound has softened up considerably. I have had the equipment on 24/7 since Friday. It started off kind of bright and thin. 
@parimento1I'm looking forward to purchase FI-46 G with  FP-S022N for my DAC. Could you please tell me how do like FI-46 so far?