Union with Brahma, or company of Brahma?

The following phrase comes from DN 13: > “ayameva ujumaggo, ayamañjasāyano niyyāniko niyyāti takkarassa > **brahmasahabyatāya**, yvāyaṃ akkhāto brāhmaṇena pokkharasātinā”ti. T.W. Rhys Davids translated here as: > ‘This is the straight path, this the direct way which makes for > salvation, and leads him, who acts according to it, into a state of > **union with Brahmā**. I mean that which has been announced by the Brahman > Pokkharasādi.’ Bhikkhu Sujato translated here as: > “This is the only straight path, the direct route that leads someone > who practices it to the **company of Brahmā**; namely, that explained by > the brahmin Pokkharasāti.” What does "brahmasahabyatāya" mean? What does "sahabyatāya" mean? This translation could be meaningful. "Union with Brahman" sounds like the modern Hindu concept of Moksha which is a union with God or Ultimate Reality. On the other hand, "company of Brahma" sounds like rebirth into the Brahma realm. What's the correct interpretation?