ADS1112 vs ADS1115

I've designed a project that uses the ADS1112 (using 3 channels in single ended mode).

Now there is the ADS1115 that can do the same and is a lot cheaper.

I know I'll have to change my layout and firmware. But I'm just not sure if the performance of both parts is equivalent, or if the ADS1112 costs more because it has better specifications.

Looking at the datasheets it seems the other way, but I'm not sure.

Thanks, Mauricio