Muhammad - it depends to what extent you mean 'similar'. If it is very similar then that is poor practice and potentially 'salami-slicing'. If it's different data/results, but a similar topic area, that would be consider normal amongst publishers. Best to carefully read the 'copyright' statements/declarations etc in your target journal for the second review. It should assist giving a clear indication as to what constitutes 'original' or not.
Muhammad - it depends to what extent you mean 'similar'. If it is very similar then that is poor practice and potentially 'salami-slicing'. If it's different data/results, but a similar topic area, that would be consider normal amongst publishers. Best to carefully read the 'copyright' statements/declarations etc in your target journal for the second review. It should assist giving a clear indication as to what constitutes 'original' or not.