Will a Focusrite Scarlett Solo Compact USB Audio Interface be a better soundcard for my PC?

scarlet is 24bit/96khz while your usb adapter is 16bit/48khz
https://www.youtube.com/watch?v=tA5JS31n3sQ
https://www.youtube.com/watch?v=W9CLoRTIcUU
https://www.youtube.com/watch?v=-Bd99cADk70

basically, recording in 96khz 24bit is more ideal for production use while your finished product is fine at 48khz 16bit. whether or not you care/want/need an upgrade from what you have now to something else depends on what you are recording, what your current quality levels are like and if you deem the differences worth your while as well as if the device itself that you are using now is performing well without hissing or other problems.

tldr: its better but whether or not its worthwhile is subjective depending on your current performance levels. if your quality is already great then you will likely not notice much audible difference.