I originally split 50/50 between ICLN and TAN, they overlap on some solar stocks, so basically I hedged stronger on solar. They’ve both done well, but TAN a lot better. Obviously they are higher fees than VTI or something, but washes out if solar keeps doing well.
Also, I bought ICLN over QCLN because they were very similar but QCLN had a large TSLA holding, which is great (and did well...), but I own individual TSLA as well so figured might as well have other stocks.