No, retrotransposons and retroposons are not the same.

Retrotransposons act like retrovirus RNA with the exception of their being unable to escape and infect other cells. Retrotransposons begin as an RNA sequence and encode for a reverse transcription to make them into a double stranded DNA fragment which can then be inserted into other sections of the genome.

Retroposons are repetitive DNA fragments that have already been inserted into the genome. The difference is that the DNA has been reverse transcribed from any RNA molecule.

In contrast to retrotransposons, the retroposons never encode reverse transcriptase. Which means they are not capable of autonomous transposition activity, unlike transposons.