Complex sentence: In general, the Mega PC was seen as a nicer build than that of Sega's "TeraDrive", as the unit itself was more robust and accommodated for air circulation more efficiently than that of the TeraDrive.
Split into simpler sentences: In general, the Mega PC was a much nicer build than that of Sega's "TeraDrive". The unit itself was more robust and it accommodated for air circulation more efficiently than that of the TeraDrive.