Both the Valve Index and HP Reverb G2 are impressive virtual reality headsets, with a variety of features that cater to different kinds of users. The Valve Index offers a field of view (FOV) of 130° which is larger than the HP Reverb G2’s 114° FOV, giving you a more immersive experience when using the Index. The resolution on the Valve Index is also slightly higher than that of the Reverb G2, 1440 x 1600 pixels versus 2160 x 2160 pixels respectively. This difference in resolution ensures better image quality when using the Index as compared to the Reverb G2.

In terms of minimum graphics requirements, both headsets require powerful processors in order to work optimally but with differing standards. For example, while the Valve Index requires either an Nvidia GeForce GTX 970 or AMD RX480 processor; the HP Reverb G2 has much higher requirements such as an Intel Core i5 or Intel Xeon E3-1240 v5 processor and either an Nvidia GeForce GTX 1080 or AMD Radeon RX 5700 for PC's or an Nvidia Quadro P5200 or AMD Radeon Pro WX 8200 for Professional Workstations. Because of this, it could be argued that having more powerful hardware may be necessary if you want to use certain features on either headset such as room scale tracking and other high-end features.

The refresh rate available on each headset also varies significantly; whilst some may prefer lower rates due to smoother performance, others might prefer higher rates for more detailed images and less blurriness during intense movements within a game or application. The Valve Index offers 120Hz refresh rate whereas HP Reverb G2 only offers 90 Hz meaning there will be noticeable differences between how games appear depending on which headset you choose; so take this into account if your main goal is achieving crisp visuals when gaming/using VR applications.

As both headsets offer similar 360 tracking capabilities they can each provide you with excellent positional accuracy - making them perfect for those who wish to move around without any lag present in their surroundings - however I would give preference to HP Reverb G2 here since its sensors are built directly into its design providing superior accuracy over time due to not requiring external sensors like many other similar devices do (including Valve Index).

Overall I found both headsets had great specs however my preference was definitely towards Valve index due mainly because it provided better resolution/image quality than what was offered by HP Reverb G2 along with its large FOV (field of view) being larger than that offered by its competitor allowing me to get lost in VR much easier - so I would recommend this one above all else!