Is Oculus Go as good as Rift? They're really not the same thing, so it's not exactly a fair comparison. The Oculus Go is newer. It has some features that I'd like to see in more headsets, specifically:

Excellent built-in audio — I much prefer projected audio to headphones. It's more comfortable and you can still hear the real world around you. Completely self-contained (no cables other than for charging). Super easy setup. It's literally 5 minutes or less and you're good to go. Incredibly easy to use. Very affordable price point. For me, all of these are big deals for the future of VR.

However, there is one big drawback to the Oculus Go: the tracking. The Go only tracks rotation. It cannot track position. The technical term is 3 degrees of freedom (rotation in three different directions: yaw, pitch, and roll). If you sit still and only turn your head, the Go will provide a decent experience. However, the second you move your body while wearing the Go, it will feel unpleasant. Your brain doesn't appreciate the disconnect between actual movement and how the view updates

In comparison, the Rift has some drawbacks:

Uses headphones, which can add to the claustrophobic feeling of a VR headset
Requires a powerful PC to run.
Much trickier to set up.
Not as easy to use.
Much more expensive (especially when you include the cost of the PC).
But it has one huge advantage: the Rift tracks rotation and position (yaw, pitch, roll, x, y, and z). This means you can walk around and the virtual scene will update correctly. It makes a big difference to the experience. It's hard to convey how huge the difference is, but it's big. Maybe comparable to the difference between a Black & White TV and a new 4K OLED TV. Sure, they are both TVs, but you get a whole different experience from the 4K OLED.

A secondary advantage of the Rift is its controllers. The Rift can track the precise position of both hands and fingers (if you have the Touch controllers). In contrast, the Oculus Go controller is very limited. There's only one and it doesn't track position at all.

In Conclusion

These are two quite different devices.

If you have a casual interest in VR and a limited budget, the Go is great. If you want something super easy to use, definitely consider the Go. If you really want to dig into VR and have the full experience, (and budget is less of an issue) the Rift is the way to go.

Put it this way, all things being equal, and if those are the two choices on offer… If I was buying a VR headset for my parents, I'd get the Go. For my teenage kid, I'd get the Rift.