There are lots of editing software these days, and most offer tools that look similar. The devil is in the details though, algorithms and engines are different and the quality of the finish product, i.e. your photo may differ drastically as a result.
I have never tried PhotoPlus but I do not expect any miracles here tbh. Most photogs use either PS+LR, Capture One Pro or DxO as far as I know.
Lightroom is a standard that is used by many photographers and I would rather bite the bullet, spend a bit more but get a reliable, proven convertor/editor with good cataloging system. Which Lightroom is. You can buy it with one off payment.
If you want the best, at the moment, in my view, Capture One 8.3 Pro is simply amazing. New HDR engine is great, Clarity, Gradients, Sharpening work are great, you can do some advanced things like changing colors with local adjustments in layers etc. So basically it is a high quality all-in-one solution that I would ultimately recommend.
Anyway, do not buy without trying. Most software offer an online one month free trying period. So you can play for several months with various editors and later decide which one to go for.