Most observers believe Airbus will rebounds its slow start as many assembled frames are awaiting parts and provisions. However, a third of the year has transpired leaving a smaller window of time for catching up. Boeing has its boot on Airbus performance neck and it won't let up as it transitions from model generation to another. Going from NG to Max will be an exercise planned for with many of its risks already retired. Going forward with the 787-10 follows in the footsteps of the 787-9 development pathway. The real risk Boeing faces is forming the first set of 777X's for which the aviation world eagerly awaits.
The Airbus strong suit is its productivity and Boeing has a substantial lead over that important measure. It leads Airbus by 151 single aisle delivered to Airbus' 143 as shown in Figure 3 and 4.
Additionally, Boeing is padding its backlog with a robust first four months in a "down year with 169 net Single Aisle orders (Fig. 1). Airbus tallies 37 net orders in (Fig. 2). Air Shows and held back orders could even that score up but Boeing is on its way in a plus year over Airbus for the category.
The Boeing duo aisle orders have a life with net 33 but needs more for a good year (Fig.5). Airbus is on life support with 8 net wide body orders in (Fig. 6).
The conclusion for April is Boeing is hard at work with both its orders and deliveries as it out paces Airbus with 202 orders to Airbus 29 net orders. Shown in figure 9. Boeing out produces Airbus by a score of 220 Boeing to 182 Airbus frames delivered. Airbus won't catch Boeing for the title of World's largest framer during 2017.
The remaining points are self contained in the below chart. If an error occurs pleas let me know as many spinning plates are in the air in fluid and dynamic aviation universe.