Lotus since both singles from that album are certified unlike BJ + Let There Be Love went #1 on a chart, the concert X did in New Orleans had a bigger audience than Brit's Vegas residency overall total for dozens of dates, and the features during that era: Feel This Moment + Say Something beat Scream, & Shout.
I actually have no idea.
Sales for album and singles, please? All I remember is that both Your Body and Work Bitch had such anticipation from me and ATRL.
WB is well over 900k and will be platinum by the end of the year. It also has more views than YB despite being released a year later and will be more remembered than anything from Lotus.
If I remember correctly (because it's hard to find historical receipts for BJ when searching), BJ opened with more in its opening week but consistently sold less than Lotus in the subsequent weeks.
Both eras are disappointing flops though and both Brit and X seemed to not even care about those albums. YB didn't do quite as well as Work Bitch obviously, but Just A Fool sold nicely for no video/promotion and peaked just a few positions higher than Perfume & Let There Be Love was a no 1 club hit. Britney is doing well in Vegas and Christina was getting paid well to be on the Voice.