at the same yield; at higher yields

[mouse]

Помогите перевести, пожалуйста.
Я понимаю, о чем речь, но как нормально, красиво перевести "at the same yield", "at higher yields".
The new catalyst operates either at the same yield as earlier catalyst R-130 but with higher activity, or at higher yields, similar to the R-230 catalyst, but with the activity of R-130 catalysts.
Спасибо