Is 1080i as good as 1080p?

1080i/50 is better than 1080p/25. One frame in 1080i/50 is always derived in half with old and new fields and framerate is truly 50. This makes much better motion but detailaccuracy is same level as in 25p. Both have same bitrate so 1080i is clear winner in this comparison.

1080p/50 has better video quality than 1080i/50 but it has double bitrate which is a problem in broadcasting.