Sprott Junior Gold Miners ETF (SGDJ)

I was looking for a junior gold mining etf, for a bit of risk with metals a massive industry at the moment, and was immediately directed to GDXJ. However, upon further research, i found that it no longer truly tracks small cap gold miners, more mid cap, and that it even underperforms gold itself. So i found SGDJ. What is everyone’s thoughts? or just stick with GDX? Thanks!