You're not doing tax loss harvesting in both portfolios are you? There are tax implications to that.

Also, comparing returns on different portfolios in different services is meaningless. You could have had a bond-weighted portfolio in one service and a stock-weighted portfolio in the other; saying that one service is better than the other because it had better returns makes no sense. The service you use can't possibly influence the performance of its underlying funds.

You should compare them on factors like features offered, ease of use, fees, customer service, etc.