One bird VM (HA cluster) or two bird VMs (iBGP).

Hi, I have one global operator and one IX via BGP and I'm wondering whether to set up one bird VM based on vmware HA cluster or two bird VMs without vmware HA cluster but located on separate nodes and connected via iBGP. Of course, the iBGP connection allows for easy bird/VM updates but may generate potential problems with iBGP and VRRP. However, if there is one bird VM based on the vmware HA cluster, then in the event of a node failure, it is necessary to wait until the machine is restarted on the second node and until the prefixes from peers are loaded. What are your experiences with this? Thanks in advance, Mike