According to Paultan.org, the 1.0L will have wet belt
http://paultan.org/2015/11/07/driven-honda-1-0-and-1-5-litre-vtec-turbo-first-impressions-via-a-euro-civic-hatch-and-jade-rs-mpv/honda-1-0-turbo-panel/and the 1.5L will have a timing chain, following your link. Also the naturally aspirated 1.5i-vtec now powering HR-Vs and Fits has a timing chain:
http://www.hondapartsnow.com/parts-list/2015-honda-fit-5dr_lx-ka-6mt/camshaft-cam-chain.htmlPictures of the new two Civic X engines show how they probably belong to different families, inlet ports, exhaust ports, turbocharger, kat and minor devices (generator, a/c compressor) have different layout. Meanwhile, there are few info and pictures about the 1.3...
1.3L Atkinson Cycle DOHC i-VTEC
The completely new 1.3L Atkinson Cycle DOHC (Double Over Head Camshaft) i-VTEC engine delivers 73kW and 119Nm of torque. Introducing elements of Hondas Earth Dreams Technology, it greatly enhances both the driving performance and fuel efficiency of the vehicle.
The DOHC valvetrain means greater performance in conjunction with i-VTEC and E-VTC (Electric Variable Timing Control).
The Atkinson cycle engine coupled with the all new CVT transmission provides excellent fuel economy and driver enjoyment.
Fuel economy figures have also significantly improved due to the efficient nature of the Atkinson cycle layout, extensive friction reduction measures and drastic improvements in weight and lubrication in the CVT gearbox.
Fuel efficiency is improved by 1.5L per 100km. This equates to a more than 147km of extra driving per tank of petrol, even though the tank is 2 litres smaller than the previous model.
Key New Features
Cylinder Head and Valvetrain
Double Over Head Camshaft configuration
High Flow Intake port
i-VTEC with Electric Variable Timing Control (E-VTC)
Engine Bottom End
Aluminium cooling collar
Improved cooling and lubrication
Revised piston design
Reduction in weight of rotational parts
High compression 13.5:1 ratio.
EGR cooler
Atkinson Cycle Operation
Improved Fuel Economy, over 25% reduction in L/100km over previous generation Jazz 1.3 engine. Reduced from 6.6L/100km to 5.1L/100kms.
The modern Atkinson engine delays the intake valve closing, causing the compression stroke to be shorter than the power stroke. As a result the compression ratio is decreased, while the expansion ratio remains the same. This means the air in the expansion stroke is at a higher compression ratio. The benefit of this is that the pressure in the combustion chamber at the end of the power stroke is as close as possible to atmospheric pressure, meaning that more of the energy obtained from the explosion has been converted into mechanical power (something we can use to turn the wheels, rather than heat), thus increasing the efficiency and resulting in a more effective use of the petrol.
As controlling the intake valve operation is the key to the modern Atkinson engine, Honda has matched this with a combination of i-VTEC and Electric VTC systems. The combination of these technologies gives both the advantages of an Atkinson Cycle engine, coupled with the economy and performance advantages provided by the high and low cam profiles of the i-VTEC system. The electric VTC system also gives more rapid and precise control of camshaft advance and retard, and continuous control of valve phase. from Honda New Zealand website.
Wikipedia and Automobile-Catalog talk about a L13B engine so, as you said, it should have a timing chain.
Many thanks and sorry again for my english.