The last time I covered a quantum computing ETF was back in May, when I gave a prescient hold rating to the Defiance Quantum ETF (QTUM). I've had problems with how the Sorry QTUM, WQTM Is The Better Quantum ETF Summary - I'm issuing a buy on WisdomTree's WQTM. I've rated Defiance's QTUM a hold since it debuted, based on how it's built, not on quantum's direction. - Since WQTM's inception, QTUM returned 32.16% and XLK 25.46% against WQTM's 6.47%. That gap came from megacap tech, not from quantum computing firms. - WQTM's index scores each firm on quantum revenue purity. IonQ, D-Wave, and Rigetti are its top three weights. QTUM is equal-weighted, so megacap tech dominates its returns. - Both funds hold high-beta speculative names. In a market downturn WQTM is likely to sell off harder, and its 0.45% ER tops QTUM's 0.40%. - If you're speculating on quantum, size the position first. Sizing matters more than picking WQTM over QTUM. This article was written by Analystâs Disclosure: I/we have a beneficial long position in the shares of AMZN, GOOGL, IBM either through stock ownership, options, or other derivatives. I wrote this article myself, and it expresses my own opinions. I am not receiving compensation for it (other than from Seeking Alpha). I have no business relationship with any company whose stock is mentioned in this article. Seeking Alpha's Disclosure: Past performance is no guarantee of future results. No recommendation or advice is being given as to whether any investment is suitable for a particular investor. Any views or opinions expressed above may not reflect those of Seeking Alpha as a whole. Seeking Alpha is not a licensed securities dealer, broker or US investment adviser or investment bank. Our analysts are third party authors that include both professional investors