Is this significant in that the Saudis are F-15 and Typhoon customers and appear to be buying more of the former and no more of the latter?
Not necessarily. The Saudi's see keen to modify as many of the original order of Tranche 2 Typhoons as possible to Tranche 3 standard with GA capability to make them dual/swing-role.
If there is a follow-on order I'd expect it to be for full Tranche 3 capability and with an AESA radar, which means any order might be several years away.
It may be strongly influenced by whether the Typhoon wins the India MMRCA contract, where the decision
is expected within the next 2 weeks.